California's 9th congressional district

California's 9th congressional district is a congressional district in the U.S. state of California. Josh Harder, a Democrat, has represented the district since January 2023.

Currently, the district includes most of San Joaquin County and small parts of neighboring Contra Costa County and Stanislaus County. It includes the cities of Stockton, Lodi, Tracy, Manteca, and Mountain House in San Joaquin County, and the census-designated place of Discovery Bay in Contra Costa County.

The district was one of 13 congressional districts that voted for Donald Trump in the 2024 presidential election while simultaneously electing a Democrat in the 2024 House of Representatives elections.

Recent election results from statewide races 2023–2027 boundaries Year Office Results2008 PresidentObama 55% - 45%2010 GovernorBrown 48% - 46% Lt. GovernorMaldonado 46% - 42% Secretary of StateBowen 48% - 43% Attorney GeneralCooley 49% - 41% TreasurerLockyer 51% - 41% ControllerChiang 55% - 37%2012 PresidentObama 56% - 44%2014 GovernorBrown 53% - 47%2016 PresidentClinton 54% - 41%2018 GovernorNewsom 52% - 48% Attorney GeneralBecerra 54% - 46%2020 PresidentBiden 55% - 43%2022 Senate (Reg.)Padilla 51% - 49% GovernorDahle 52% - 48% Lt. GovernorUnderwood Jacobs 51% - 49% Secretary of StateBernosky 50.3% - 49.7% Attorney GeneralHochman 50.5% - 49.5% TreasurerGuerrero 51% - 49% ControllerChen 53% - 47%2024 PresidentTrump 49% - 48% Senate (Reg.)Garvey 51% - 49%

Composition County Code County Seat Population13Contra CostaMartinez1,155,025 77 San Joaquin Stockton 789,41099StanislausModesto551,430 Under the 2020 redistricting, California's 9th congressional district is located between the Sacramento Valley, Gold Country, and the San Joaquin Valley. It encompasses most of San Joaquin County, and parts of Contra Costa and Stanislaus Counties. The area in San Joaquin County includes the cities of Stockton, Tracy, Manteca, Lodi, Ripon, and Escalon; and the census-designated places Mountain House, Terminous, Thornton, Collierville, Woodbridge, Acampo, Dogtown, Lockeford, Victor, Lincoln Village, Morada, Country Club, August, Garden Acres, Kennedy, Taft Mosswood, French Camp, Waterloo, Linden, Peters, Farmington, and Del Rio. The area in Contra Costa County includes the census-designated places Discovery Bay and Byron. The area in Stanislaus County includes the census-designated place Valley Home.

San Joaquin County is split between this district and the 13th district. They are partitioned by Union Pacific, Highway 380, S Tracy Blvd, the California Aqueduct, S Banta Rd, Highway 5, Paradise Cut, S Manthey Rd, Walthall Slough, E West Ripon Rd, Kincaid Rd, Hutchinson Rd, and Stanislaus River.

Contra Costa County is split between this district and the 10th district. They are partitioned by Old River, Italian Slough, Western Farms Ranch Rd, Rankin Rd, Highway J14, Byron Hot Springs Rd, Camino Diablo, Kellogg Creek, Sellers Ave, Brentwood Blvd, Alloro Dr, Ghiggeri Dr, Emilio Dr, Guthrie Ln, Balfour Rd, Chestnut St, Byron Highway, Orwood Rd, Burlington Northern Santa Fe, Werner Dredger Cut, and Rock Slough.

Stanislaus County is split between this district and the 13th district. Lon Dale Rd, Highway J9, Highway J14, River Rock Rd, Lesnini Creek, Sonora Rd, and Stanislaus River.

Cities and CDPs with 10,000 or more people Stockton – 320,804 Tracy – 93,000 Manteca – 83,498 Lodi – 67,258 Mountain House – 24,499 Ripon – 16,013 Discovery Bay – 15,385 Garden Acres – 11,398 Country Club – 10,777

2,500 – 10,000 people

August – 8,628 Escalon – 7,472 Lincoln Village – 4,401 Woodbridge – 4,031 French Camp – 3,770 Lockeford – 3,521 Kennedy – 3,256 Morada – 3,166 Collierville – 2,698 Dogtown – 2,643

Future composition Beginning with the 2026 election, the 9th district will consist of the following counties:

Contra Costa (part) San Joaquin (part)

List of members representing the district Representative Party Dates Congress Electoral history Counties District created March 4, 1913 Charles W. Bell Progressive March 4, 1913 –March 3, 1915 Elected in 1912.Lost re-election. 1913–1933Los Angeles outside Los Angeles city Charles Hiram Randall Prohibition March 4, 1915 –March 3, 1921 Elected in 1914.Re-elected in 1916.Re-elected in 1918.Lost re-election. Vacant March 4, 1921 –April 11, 1921 Representative-elect Charles F. Van de Water died November 20, 1920. Walter F. Lineberger Republican April 11, 1921 –March 3, 1927 Elected to finish Van de Water's term.Re-elected in 1922.Re-elected in 1924.Retired to run for U.S. Senator. William E. Evans Republican March 4, 1927 –March 3, 1933 Elected in 1926.Re-elected in 1928.Re-elected in 1930.Redistricted to the . Denver S. Church Democratic March 4, 1933 –January 3, 1935 Elected in 1932.Retired. 1933–1943Fresno, Kings, Madera, Merced, Stanislaus Bertrand W. Gearhart Republican January 3, 1935 –January 3, 1949 Elected in 1934.Re-elected in 1936.Re-elected in 1938.Re-elected in 1940.Re-elected in 1942.Re-elected in 1944.Re-elected in 1946.Lost re-election. 1943–1953Fresno, Madera, Merced, Stanislaus Cecil F. White Democratic January 3, 1949 –January 3, 1951 Elected in 1948.Lost re-election. Allan O. Hunter Republican January 3, 1951 –January 3, 1953 Elected in 1950.Redistricted to the . J. Arthur Younger Republican January 3, 1953 –January 3, 1963 Elected in 1952.Re-elected in 1954.Re-elected in 1956.Re-elected in 1958.Re-elected in 1960.Redistricted to the . San Mateo Don Edwards Democratic January 3, 1963 –January 3, 1975 Elected in 1962.Re-elected in 1964.Re-elected in 1966.Re-elected in 1968.Re-elected in 1970.Re-elected in 1972.Redistricted to the . 1963–1967Eastern Santa Clara 1967–1973Southwest Alameda, most of Santa Clara 1973–1975Southwest Alameda, northeast Santa Clara Pete Stark Democratic January 3, 1975 –January 3, 1993 Redistricted from the and re-elected in 1974.Re-elected in 1976.Re-elected in 1978.Re-elected in 1980.Re-elected in 1982.Re-elected in 1984.Re-elected in 1986.Re-elected in 1988.Re-elected in 1990.Redistricted to the . 1975–1983Alameda outside Oakland Ron Dellums Democratic January 3, 1993 –February 6, 1998 Redistricted from the and re-elected in 1992.Re-elected in 1994.Re-elected in 1996.Resigned. 1993–2003Alameda (Berkeley, Oakland)Vacant February 6, 1998 –April 7, 1998 Barbara Lee Democratic April 7, 1998 –January 3, 2013 Elected to finish Dellums's term.Re-elected in 1998.Re-elected in 2000.Re-elected in 2002.Re-elected in 2004.Re-elected in 2006.Re-elected in 2008.Re-elected in 2010.Redistricted to the . 2003–2013Alameda (Berkeley, Oakland) Jerry McNerney Democratic January 3, 2013 –January 3, 2023 Redistricted from the and re-elected in 2012.Re-elected in 2014.Re-elected in 2016.Re-elected in 2018.Re-elected in 2020.Retired. 2013–2023Central Valley including San Joaquin Delta and Stockton Josh Harder Democratic January 3, 2023 –present Redistricted from the and re-elected in 2022.Re-elected in 2024. 2023–present:northern San Joaquin Valley

Election results 1912 • 1914 • 1916 • 1918 • 1920 • 1921 (Special) • 1922 • 1924 • 1926 • 1928 • 1930 • 1932 • 1934 • 1936 • 1938 • 1940 • 1942 • 1944 • 1946 • 1948 • 1950 • 1952 • 1954 • 1956 • 1958 • 1960 • 1962 • 1964 • 1966 • 1968 • 1970 • 1972 • 1974 • 1976 • 1978 • 1980 • 1982 • 1984 • 1986 • 1988 • 1990 • 1992 • 1994 • 1996 • 1998 (Special) • 1998 • 2000 • 2002 • 2004 • 2006 • 2008 • 2010 • 2012 • 2014 • 2016 • 2018 • 2020 • 2022

1912

1914

1916

1918

1920

1921 (Special) Republican Walter F. Lineberger won the special election to replace fellow Republican Charles F. Van de Water, who won the election but died before the 67th Congress convened. Data for this special election is not available.1921 special election results

1922

1924

1926

1928

1930

1932

1934

1936

1938

1940

1942

1944

1946

1948

1950

1952

1954

1956

1958

1960

1962

1964

1966

1968

1970

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998 (Special)

1998

2000

2002

2004

2006

2008

2010

2012

2014

2016

2018

2020

2022

2024

California's 9th congressional district

Bron en licentie